Mersen Midget Fuse Block, 30A ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$15.56
Mersen Midget Fuse Block, 30A 600VAC/600VDC, DIN Rail Mount

Mersen Midget Fuse Block, 30A 600VAC/600VDC, DIN Rail Mount

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Model: 30311

In Stock (leaves warehouse same day if ordered before 3pm ET)

$15.56
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Mersen Midget Fuse Block, 30A 600VAC/600VDC, DIN Rail Mount

The Mersen Midget Fuse Block delivers reliable circuit protection for AC and DC electrical systems with a dual 600VAC/600VDC voltage rating and a 30A current rating. Built from glass filled polycarbonate for insulation and mechanical strength, this fuse block features a reinforced clip for secure midget fuse retention and supports both screw mount and DIN rail installation for flexible panel integration in industrial and commercial applications.

Key Features

  • 30A Current Rating: Provides robust circuit protection for medium-duty electrical applications with reliable amperage handling.
  • Dual 600VAC/600VDC Rating: Offers versatile voltage compatibility for both alternating and direct current systems in a single unit.
  • Durable Construction: Glass filled polycarbonate body ensures superior insulation properties and mechanical strength for long-term reliability.
  • Reinforced Clip Design: Delivers secure midget fuse retention with enhanced mechanical stability for consistent electrical contact.
  • Dual Mounting Options: Accommodates both screw mount and DIN rail installation for flexible panel integration.
  • High SCCR Rating: Supports 10 to 100 kA short circuit current rating depending on fuse selection for comprehensive fault protection.
  • Midget Fuse Class, Clip-In Installation: Accepts Class Midget fuses via a clip-in method rated 50/60 Hz.
  • Torque Rating: Rated to 20 lb-in for secure, code-compliant terminal connections.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • Amperage Rating: 30A
  • Rated Voltage: 600VAC/600VDC
  • Body Insulating Material: Glass Filled Polycarbonate
  • Fuse Class: Midget
  • Fuse Installation Method: Clip-in
  • Installation Mounting: Screw Mount or DIN Rail
  • Frequency: 50/60 Hz
  • Short Circuit Current Rating (SCCR): 10 to 100 kA (dependent on fuse rating)
  • Torque Rating: 20 lb-in
  • RoHS Compliant: Yes

Typical Applications

  • Industrial Control Panels and Motor Control Centers
  • Commercial Electrical Distribution Systems
  • DC Power Supply and Battery Backup Systems
  • Manufacturing Equipment Protection
  • Process Control and Automation Systems
  • Renewable Energy and Solar Power Applications

Why Mersen?

Mersen fuse blocks deliver proven reliability with glass filled polycarbonate construction and RoHS compliance for professional electrical installations. The reinforced clip design and dual mounting capability ensure secure installation and long-term performance in demanding applications requiring dependable 30A, 600VAC/600VDC circuit protection.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Product Type:
Fuse Block
Product Material:
Glass Filled Polycarbonate
Amperage Rating:
30A
Voltage Rating:
600VAC/600VDC
Connection Type:
Clip-In
Standards:
RoHS Compliant
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuse Holders & Blocks
Product Height:
1.31 in
Product Length:
3.04 in

Mersen 30311 – Frequently Asked Questions

1) What size fuses does the Mersen 30311 midget fuse block take?
It takes Class Midget fuses, which are the 13/32 x 1-1/2 inch cylindrical fuses, up to 30A. The fuse drops in via a reinforced clip rather than bolting down, so there is no fuse hardware to order separately. Voltage rating on the block is 600VAC/600VDC, so pair it with a midget fuse rated for the voltage of your circuit.
2) Can I mount a Mersen midget fuse block on DIN rail, or does it have to be screwed to the panel?
Either. The block carries both a DIN rail clip and screw mount holes, so you can snap it onto 35mm rail alongside your other control components or bolt it straight to a sub-panel where rail isn't run.
3) Will this Mersen fuse block work on a 600V DC solar or battery circuit?
Yes. The block is rated 600VDC as well as 600VAC, so it is usable on DC power supplies, battery backup strings and PV circuits within 600V. If your array string voltage runs above 600VDC, this is the wrong block, and something like the Bussmann CHPV2 Series photovoltaic fuse block rated 1000 Vdc is the direction to look.
4) What is the SCCR of the Mersen 30A midget fuse block for my panel label?
Short circuit current rating runs 10 kA to 100 kA, and which figure applies depends on the midget fuse you install. For an industrial control panel SCCR calculation, use the rating that corresponds to the specific fuse catalog number going into the block, not the top of the range.
5) Can a Littelfuse LFG60015-1SQDINR be used in place of the Mersen 30311 midget fuse block?
No. The LFG60015-1SQDINR is a Class G fuse block rated 600V 15A for DIN rail mounting, while the Mersen 30311 series is a Class Midget block rated 30A at 600VAC/600VDC. Both mount to DIN rail, but Class G and midget fuses have different body dimensions and the amperage ceilings differ, so the two are not substitutes for one another.
6) What is the closest alternative to the Mersen 30311 midget fuse block if the panel uses Class R fuses instead?
The Mersen 30311 series accepts Class Midget fuses by a clip-in connection at 30A, 600VAC/600VDC. Midget and Class R fuses are not interchangeable in the same clips, so a panel built around Class R fuses needs a Class R block such as the Littelfuse LFR60030-3CID, a Class R fuse block rated 600V 30A in a 3-pole arrangement. Match the fuse class to the block before ordering either one.
7) What should I use instead of the Mersen 30311 for a photovoltaic string above 600 Vdc?
The Mersen 30311 midget fuse block is rated 600VAC/600VDC, so a PV array operating above 600 Vdc is outside its voltage rating. For those strings, a photovoltaic-specific block such as the Bussmann CHPV2 series modular two-pole block rated 1000 Vdc is the one to specify. The Mersen block remains appropriate for DC circuits at or below its 600VDC rating.
8) Is the Bussmann CHCC2DIU an equivalent to the 2-pole Mersen 30312 fuse block?
They are close in form but not in fuse class. The Mersen 30312 is the 2-pole version of the midget block, taking Class Midget fuses clip-in at 30A, 600VAC/600VDC. The Bussmann CHCC2DIU is a 2-pole Class CC modular fuse block that is finger-safe and carries a blown-fuse indicator. If the drawing calls for Class CC fuses or requires finger-safe terminals and local indication, the CHCC2DIU is the match; for midget fuses, stay with the Mersen.
9) My panel layout has no DIN rail and needs a bolted block - what is the alternative to the Mersen midget block?
The Mersen 30311 series mounts either by screws or on DIN rail, so it covers most panel layouts. Where a bolt-in block is specified, the Littelfuse LD series POWR-BLOKS is a bolt-in mounting fuse block. Confirm the fuse class your circuit uses, since the Mersen block is built for Class Midget fuses.
10) I need more than three poles - does the Mersen midget fuse block go beyond 3-pole?
The Mersen midget fuse block is offered in 1-pole, 2-pole, and 3-pole versions. For a higher pole count in one assembly, the Bussmann 3833 series AGC fuse block is available in 1 to 8-pole configurations, though it is built for AGC fuses rather than midget. Another route is ganging multiple Mersen blocks on the DIN rail to reach the circuit count you need.
11) Is the Mersen midget fuse block body suitable for a hot industrial enclosure?
The body is glass filled polycarbonate, chosen for dielectric strength plus mechanical rigidity so the fuse clips stay in alignment under vibration and panel heat. It is RoHS compliant, which matters if you are building export panels.
12) Is a 30A midget fuse block fine at 50 Hz for an export control panel?
Yes, the block is rated 50/60 Hz, so it works on both 60 Hz North American and 50 Hz systems. Combined with RoHS compliance, that covers most export panel requirements for the block itself.
How fast can I get the Mersen 30311 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mersen 30311 come with a warranty?
Absolutely. The Mersen 30311 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mersen 30311?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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